车辆通过没有交通信号或交通标志控制的环形路口时,进入环形路口的车应让已在路口内的车先行。
参考答案:对
艺术活动产生于人类的______时期。
A.原始社会B.奴隶制前期C.奴隶制后期D.文明
A typical application of this (71) is ADSL. It is emerging as the technology for home-and small-office Internet connectivity. It provides either 1.5 Mb/s~8 Mb/s from the network to the user and 64 Kb/s~512 Kb/s in the reverse direction depending on the distance, 12 000 or 18 000 feet.. The different speed for each direction gives it the (72) label. ADSL is designed to take advantage of the fact that video-on demand, telecommuting, and Internet access traffic are inherently asymmetrical. The user (73) a brief message up to the network and receives a ton of data coming back, either a movie or a piece of data download. Under such a scenario, low-speed traffic to the network is just fine. ADSL delivers high (74) where you need it and only uses a single copper pair. Through multiplexing, it also reserves (75) of the bandwidth for POTS.
A.2kHz
B.4kHz
C.16kHz
D.64kHz